Code division multiple access system providing variable data rate access to a user
US5856971A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1995 |
| Grant date | Jan 5, 1999 |
| Priority date | — |
| Expiry date | Jul 20, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W52/26
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A multi-code code division multiple access system allows a user at a radio transmitter unit to dynamically change its source data bit rate. In response to a user input selecting one of said plurality of source bit rates, an adjustable coding means in the transmitter spreads and transmits the user's digital bit stream received at the selected bit rate to a channel bit rate which at least equals the highest bit rate of said plurality of source bit rates. The plurality of source bit rates includes a basic bit rate R and at least one bit rate which is a multiple M of the basic bit rate R, where M is an integer of at least 1. The user's input selects a particular user source bit rate by identifying a basic bit rate multiple M to a base station that is to receive the transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.